<!DOCTYPE html> 
<html>
<head> 
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>Hello, World</title> 
<style type="text/css">  
    html{height:100%}    
    body{height:100%;margin:0px;padding:0px}    
    #container{height:100%}    
</style> 
<script type="text/javascript" src="https://api.map.baidu.com/api?v=1.0&&type=webgl&ak=1sH2UIgvEGRv7w0GnFxt1ggHkYGGar1u">
</script>
</head> 
  
<body> 
<div id="container"></div> 
<script type="text/javascript">
    var map = new BMapGL.Map("container");
    // 创建地图实例 
    var point = new BMapGL.Point(116.404, 39.915);
    // 创建点坐标 
    map.centerAndZoom(point, 15);
    // 初始化地图，设置中心点坐标和地图级别 

    var map = new BMapGL.Map("allmap");                // 创建地图实例
    var point = new BMapGL.Point(116.404, 39.915);     // 设置中心点坐标
    map.centerAndZoom(point, 12);                      // 设置地图级别
    map.enableScrollWheelZoom();                       // 开启鼠标滚轮缩放
</script> 
</body> 
</html>